# 勘察云 vs e勘察

The clearest difference is update cadence: e勘察 at fortnightly against 勘察云's every 2 months. 勘察云's advantage is iOS requirement (10.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

勘察云 ships an update every 2 months, e勘察 fortnightly. The most recent releases landed on October 16, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | 勘察云 | e勘察 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 71 MB | 45 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GUANGDONG ZHONGGONG  GEOTECHNICAL DESIN INSTITUTE CO.,LTD](https://appshunter.io/developer/1440963988) | [China Jikan Research Institute Of Engineering Investigations And Design, Co., Lt d.](https://appshunter.io/developer/1606692541) |

## What reviewers say

### 勘察云

[App page](https://appshunter.io/ios/app/id1459719340)

**Features:** macOS Compatibility

**In-app purchases:** none


### e勘察

[App page](https://appshunter.io/ios/app/e/id1606692539)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 勘察云 free?

勘察云 is free to download, with no in-app purchases.

### Is e勘察 free?

e勘察 is free to download, with no in-app purchases.

### Do 勘察云 or e勘察 have ads?

Neither 勘察云 nor e勘察 shows ads.

### Which is updated more often, 勘察云 or e勘察?

勘察云 ships an update every 2 months, and e勘察 fortnightly. Most recently, 勘察云 was updated on October 16, 2026 and e勘察 on October 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*